The instructions to try Android Jelly Bean on the Orgien board are basically the same, but you have download the latest binaries from https://android-build.linaro.org/builds/~linaro-android/panda-jb-gcc47-tilt-stable-blob in a PC running Ubuntu. As you may know Samsung has a lot of lawyer, and when they don’t have to handle Apple lawsuit, they spend there time writing license agreement for all downloads, so that you can’t download them the easy way (with wget). Here are the link for 13/08/2012 build: